Axisymmetric part for an aviation turbine engine rotor

Abstract

A link part for a turbine engine which mounted between a fan cone and a fan disk supporting fan blades is provided. The link part includes an annular wall pierced by a plurality of orifices, each orifice for receiving a fastener member and terminated by a substantially perpendicular rim having an outer surface that provides an aerodynamic extension of the fan between an outer surface of the fan cone and an outer surface of a fan blade platform. The annular wall is made of a first material that is composite and is provided on an inner surface of the rim with a ring made of a second material that is different from the first and that is suitable for radially retaining the fan blade platform.

What is claimed is: 
     
       1. A link part for a turbine engine, the link part being mounted between a fan cone and a fan disk supporting fan blades, said link part comprising:
 an annular wall pierced by a plurality of orifices, each orifice for receiving a fastener member and terminated by a substantially perpendicular rim having an outer surface providing an aerodynamic extension between an outer surface of said fan cone and an outer surface of a fan blade platform, 
 wherein said annular wall is made of a first material that is a composite material and is provided on an inner surface of said rim with a ring made of a second material which is a metal material including titanium or a metal alloy based on titanium and aluminum and is suitable for radially retaining said fan blade platform. 
 
     
     
       2. A link part according to  claim 1 , wherein said orifices are provided with metal inserts made of titanium or of metal alloy based on titanium. 
     
     
       3. A link part according to  claim 1 , wherein said outer surface providing the aerodynamic extension is covered in a fabric of composite material for withstanding lightning or erosion. 
     
     
       4. A fan including at least one link part according to  claim 1 . 
     
     
       5. A turbine engine including the fan according to  claim 4 . 
     
     
       6. A link part for a turbine engine, the link part being mounted between a fan cone and a fan disk supporting fan blades, said link part comprising:
 an annular wall pierced by a plurality of orifices, each orifice for receiving a fastener member and terminated by a substantially perpendicular rim having an outer surface providing an aerodynamic extension between an outer surface of said fan cone and an outer surface of a fan blade platform, 
 wherein said annular wall is made of a short-fiber composite material and is provided on an inner surface of said rim with a ring made of a long-fiber composite material that is different from the short-fiber composite material and is suitable for radially retaining said fan blade platform, 
 wherein said outer surface providing the aerodynamic extension is covered in a fabric of composite material for withstanding lightning or erosion, and 
 wherein the ring abuts the fan blade platform. 
 
     
     
       7. A link part according to  claim 6 , wherein said orifices are provided with metal inserts made of titanium or of metal alloy based on titanium. 
     
     
       8. A fan including at least one link part according to  claim 6 . 
     
     
       9. A turbine engine including a fan according to  claim 8 . 
     
     
       10. A link part according to  claim 6 , wherein said long-fiber composite material is of a type involving winding a yarn, a tape, or a woven or stitched preform of carbon, glass, or aramid fibers.